title: Determinants of 6-12 month postoperative functional status and pain after elective total hip replacement.
abstract: OBJECTIVE
  The goal of this pilot project was to quantify outcomes of elective total hip replacement through risk adjustment modeling.
  
  
  METHODS
  A retrospective cohort study of patients who underwent elective total hip replacement (THR) during 1991 at the Orthopaedic and Arthritic Hospital in Toronto.
  
  
  METHODS
  All patients undergoing elective total hip replacement with a confirmed diagnosis of osteoarthritis were asked to participate in the study; 193 patients agreed.
  
  
  METHODS
  Participants were asked to complete the WOMAC Osteoarthritis Index and the RAND 36-item Health Survey 6 months to 1 year post-operatively. Pre-operative information on pain and functional status was obtained from the patients' medical record.
  
  
  RESULTS
  The results indicate that 93% of patients studied reported at least one significant co-morbidity. The mean pre-operative pain score was 7.5 on a 0-10 scale and average change in pain was 4.8. Regression analyses indicate that increased body mass index is associated with lower post-operative functional status and increased post-operative pain. The amount of pain relief the patient was able to obtain pre-operatively using non-surgical interventions was associated with a better outcome.
authors.affiliation: Queen's University, Kingston, Ontario, Canada.
authors.forename: A M
authors.initials: AM
authors.lastname: Braeken
authors.forename: J A
authors.initials: JA
authors.lastname: Lochhaas-Gerlach
authors.forename: J D
authors.initials: JD
authors.lastname: Gollish
authors.forename: J D
authors.initials: JD
authors.lastname: Myles
authors.forename: T A
authors.initials: TA
authors.lastname: Mackenzie
mesh_terms: D000203:Activities of Daily Living; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000534:rehabilitation*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009864:Ontario / Q000453:epidemiology; D010003:Osteoarthritis / Q000601:surgery*; D017063:Outcome Assessment, Health Care; D010147:Pain Measurement / Q000379:methods; D010149:Postoperative Pain / Q000188:drug therapy / Q000453:epidemiology*; D010865:Pilot Projects; D012044:Regression Analysis; D012189:Retrospective Studies